The locus of the point of intersection of the lines \( \mathrm{P}^{...

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The locus of the point of intersection of the lines
\( \mathrm{P}^{16 i} \) \( a x \sec \theta+b y \tan \theta=a \), and \( a x \tan \theta+b y \sec \theta=b \),

WV where \( \theta \) is the parameter, is
(1) A straight line
(2) A circle
(3) An ellipse
(4) A hyperbola
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